Oil-can pump.



PATENTED JUNE 11, 1907.

P. H. GORNS.

OIL GAN PUMP.

APPLIOATION funn JULY ze. 190e.

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PHILLIP H. OORNS, OF DELPHOS, OHIO.

OIL-CAN PUNIP.

Specification of `Letters Patent.

Patented June 11, 1907.

Application filed July 26,1906. Serial No. 327,837.

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Be it known that l, PniLiiiP ll. CoRNs, a

Y citizen of the United States, residing at Delphos, in the county of Van WVe/rt and` State of Ohio, have invented new and useful Improvements in Oil-Can Pumps, of which the following is a specification.

This invention relates to an improvement in oil can pumps designed piiinarily for pumping oil into lamp fonts and more particularly to that type of pump in which means are provided for automatically preventing the overflow of the lamp font.

The object of the present invention is to provide a simple construction wherein a common pipe serves both as the discharge pipe and the return pipe for the overflow.

A further object of the invention is the provision in a pump of this character a cylinder, a common discharge and return pipe communicating therewith, and a single piston working within the cylinder and alternately effecting the discharge and a return suction through said pipe.

Other objects of the invention will be apparent from the detail description hereinaftei when read in connection with the accompanying drawings forming a part hereof, wherein a preferable embodiment of my invention is shown and wherein like numerals of reference refer to similar parts in the several views.

In the drawings, the figure given is a longitudinal section of my improved pump.

Referring now more particularly to the drawing, A'designates a cap which is of the usual construction and is adapted to be screwed or otherwise secured in any suitable manner in the top of an oil can. Dependingl from the cap A is a pump cylinder B, which is provided adjacent its upper end on its interior with a valve seat I), the upper end of said cylinder being normally closed by an outwardly opening valve b/ seated on said valve seat. above the valve seat b with a plurality of openings therein b2 affording a communication between the interior of the cylinder and the interior of the oil can, for a purpose to be hereinafter more particularly set forth. The lower end of the cylinder B is provided with an inwardly opening check valve b3 of l any suitable type, which has a small opening 1) formed therein C designates the common discharge and return pipe, which is preferably formed in i B.

'the cylinder B is provided two telescoping sections, and which extends through the screw cap A and terminates in the usual spout or nozzle c.

D designates a casing which is connected intermediate its ends with the lower end of the common discharge and return pipe C, the upper end of said casing being connected by a pipe (Z with the pump cylinder B adjacent the upper end thereof and the lower end of said casing being connected by a pipe (Z/ with the pump casing B at some distance from the lower end thereof. Ooncentrically secured within the casing D so as to form a continuation of the pipe d is a pipe cl2, the lower end of which terminates short of the lower end of said casing. The upper ends of the pipes d and d2 are normally closed by valves (Z3 and d, which may be of any ordinary construction.

l/Vorking within the pump cylinder B is a solid piston E to which is secured the lower end of a piston rod F, the upper end of which extends through suitable openings m the` valve b and screw cap A and terminates in a suitable operating handlef. The lower portion of the piston i'od F is provided with a reduced cr flattened 'portionf so that for a portion of the stroke of the piston air will be drawn into the interior of the pump cylinder to assist in expelling the oil therefrom.

Having described the construction of my improved pump l will now set forth the operation thereof.

With the piston in its lowerinostposition, when the same is elevated oil will be drawn through the check valve if* and into the interior of the pump cylinder B, the valves d3 and d both being held on their seats so as to' cut ofl` communication between the pipes d and d and the casing D. dien the return stroke is started and the piston is moved downwardly, during the lirst portion of its stroke oil will be delivered through the pipe d past the valve d and.out through the delivery pipe and nozzle c. This will continue until the piston passes the lower end of the pipe d', after which the valve d will be drawn down upon its seat to close the upper end of the pipe d and the valve (Z3 will be raised oil' its seat, the reduced portion f of the piston .iod having by this time passed through the screw cap A, thereby creating a suction through the discharge pipe (l and pipes d2 and d and returning the overflow to the interior of the pump casing During the latter part of the downward IOO movement of the piston B the oil atherebeneath is forced through the reduced opening b* in the check valve b3 back into the oil can. On the next upward stroke of the piston the oil which has been drawn back into the pump casing is lifted beyond the valve b and is forced out through the openings b2 into the interior of the oil can. The valve cl3 is so formed that when it is raised off' its seat at the upper end of the pipe d2, it will not close the lower end of the pipe b. This object is preferably accomplished by forming upon the upper surface of the valve a web or webs, which serve to limit the upward movement thereof, but it is obvious that any other means to limit the upward movement of said valve may be employed.

I do not desire to limit myself to the precise form and construction shown in the drawings, as it is obvious that many minor changes might be made thereto without departing from the spirit of the invention.

I claim 2# 1. In an oil can pump, a cylinder, a common discharge and return pipe communicating with the upper and lower portions of said cylinder, and a single piston working within said cylinder and alternately effecting the discharge and a return suction through said pipe.

2. In an oil can pump, a cylinder, a common discharge and return pipe, pipes connecting said discharge and return pipe with the upper and lower portions of said cylinder, valves in said pipes, and a single piston working within said cylinder and alternately effecting the discharge and a return suction through said pipe..

3. In an oil can pump, a cylinder having a reduced opening in the lower end thereof, a common discharge and return pipe7 a pipe connecting said discharge and return pipe with the pump cylinder adjacent its upper end, a pipe connecting said discharge and return pipe with said cylinder at some distance from the lower end thereof, valves in said pipes, and a single piston working within said cylinder.

4. In an oil can pump, a cylinder having an inwardly opening valve in the'lower end thereof provided with a reduced opening therethrough, a common discharge and return pipe, separate pipes connecting said common discharge and return pipe with the upper and lower portions of the cylinder, an outwardly opening valve normally closing the upper end of said cylinder, and a single piston working within said cylinder.

5. Inan oil can pump, a cylinder having a reduced opening in the lower end thereof, a common discharge and return pipe, a casing communicating with the lower end of the discharge and return pipe, a pipe connecting said casing with the pump cylinder adjacent the upper end thereof, a pipe connecting the casing with the pump cylinder at some distance from the lower end thereof, valves in said pipes, and a single piston working within the cylinder and adapted to alternately actuate said valves to alternately effect a discharge and a return suction through said common discharge and return pipe.

6. In an oil can pump a cylinder, a cap closing the upper end thereof a common discharge and return pipe communicating therewith, a single piston working within said cylinder and alternately effecting the discharge and a return suction through said pipe, and a piston rod connected to said pis-v ton and extending through the cap closing the upper end thereof the pump cylinder, the lower end of said piston rod being porvided with areduced portion.

7. In an oil can pump a cylinder having a reduced opening in the lower end thereof and an outwardly opening valve closing the upper end thereof, a common discharge and return pipe, a casing communicating with the lower end of the discharge and return pipe, a pipe connecting said casing with the pump cylinder adjacent the upper end thereof, a pipe concentrically secured within the casing and forming a continuation of the pipe extending to the upper end of the pump cylinder, a pipe connecting the lower end of the casing with the pump cylinder at some distance from theA lower end thereof, valves normally closing the upper ends of said two last mentioned pipes, and a single piston working within said pump cylinder.

In testimony whereof I afliX my signature, in presence of two subscribing witnesses.

PHILLIP H. CORNS.

Wvitnesses JEssE B. CoRNs, WM. E. COLEY. 

